I don't recall this case.
Can you give me a quick overview?
This won't give a "quick" overview, but is well worth reading to get the case history as well as the connection to Raich, which was just decided in the gov't favor last Monday.
Afterwords, he tried to pick up the pieces of his business and sell a parts kit for his popular .50 Maadi-Griffin rifle. The receiver needed final machining by a gun smith before it could be assembled. The BATFE busted him for felon in possession of a firearm as they felt it was still too easy to assemble.
Government justification for doing so is the familiar Commerce Clause/ Title 18 Sect 922(o) that people like us have come to know and hate for the UnConstitutional spin on FedGov power that it is. F*ckers still can't get it into their tiny little heads that "infringement" is "infringement" regardless of what they think.